Hello, according to the information you provided, farmers' eggplants have fallen off, brown streak, cotton wilt and stem rot. These diseases will cause various symptoms of eggplant plants, such as seedling atrophy, leaf disease spots, fruit disease spots and so on. In order to prevent the occurrence of these diseases, we need to take corresponding measures, such as more ventilation, keeping proper light and avoiding excessive watering. If you have been infected with the disease, you can use the corresponding drugs to prevent it.
The above information is for reference only. It is suggested to consult professional agricultural technicians for effective prevention and control.